Whether you are a beginner in the zero foundation learning network or just stepping into the network engineer industry, I believe this article will definitely help you in your learning!
The following 15 basic network knowledge must be learned. Proficiency is an essential technology for learning and application in work.
1) What is a link?
A link is a connection between two devices. It includes cable types and protocols for one device to communicate with another.
2) How many layers are there in the OSI reference model?
The OSI reference model is divided into physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer.
3) How is TCP/IP layered?
TCP/IP protocol cluster is divided into application layer, transmission layer, network layer and network access layer. The network access layer can also be divided into data link layer and physical layer.
4) What is a backbone network?
The backbone network is a centralized infrastructure designed to distribute different routes and data to various networks. It also handles bandwidth management and various channels.
5) What is a LAN?
LAN (Local Area Network) is the abbreviation of local area network.
6) What is a WAN?
WAN (Wide Area Network) is the abbreviation of wide area network, also known as external network and public network.
7) What is a node?
A node is the point at which the connection occurs. It can be a computer or device that is part of a network. In order to form a network connection, two or more nodes are required. It can be understood that an interface of a device is a node.
8) What is a router?
Routers can connect two or more network segments. These are intelligent network devices that store information in their routing tables, such as paths, hops, etc. With this information, they can determine the best path for data transmission. Routers operate at the network layer of the TCP/IP protocol cluster.
9) What is a subnet mask?
The subnet mask is combined with the IP address to identify two parts: the extended network address and the host address. Like IP addresses, the subnet mask consists of 32 bits.
10) What is data encapsulation?
Data encapsulation is a downward layer by layer encapsulation (refer to the OSI/TCP/IP reference model). Each layer processes the data and adds the header information of that layer. This process is called data encapsulation.
11) What is NAT?
NAT (Network Address Translation) is a network address translation protocol that provides a way for multiple or single terminal devices in a private network to access the Internet.
12) What is the work of the network layer under the OSI reference model?
Define the logical address (provide the IP address), and realize the data forwarding from the source to the destination: the router works at this layer.
13) What is the main work of ARP?
ARP (Address Resolution Protocol) is a TCP/IP protocol that uses known IP addresses to find MAC addresses.
14) What does 10Base-T mean?
10 refers to the data transmission rate of 10 megabits per second; Base refers to baseband transmission. T represents the transmission medium, which is a twisted pair cable used for network transmission.
15) What is the role of a network administrator?
The network administrator has many responsibilities, which can be summarized as follows: installing new networks, debugging and optimizing existing networks, and network maintenance/troubleshooting.
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